Outdoor Warning Sirens

​​​​​if the sirens are blarin' -- you should be preparin'

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​​​​do you know what this is?

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​​​​COPPELL'S OUTDOOR WARNING SYSTEM (OWS)​​​​​

​​When Do They Sound?​​​​​

The sirens are sounded when there is a dangerous situation occurring​ outside, and are intended to be a cue​ for residents to seek additional information. Sirens will be sounded given one or more of the following conditions:

The National Weather Service (NWS) issues a Tornado Warning for Dallas, Tarrant, or Denton County that may impact the City of Coppell; and/or,

Tornadic activity has been reported by a reliable source in or approaching the City of Coppell; or,

Severe Thunderstorms with destructive winds in excess of 7​0 mph are occurring or are about to occur within city limits; or,

Hail 1.25" (about the size of a ping-pong ball) in diameter or larger is occurring or is expected to occur within city limits; or,

A Hazardous Chemical Emergency has occurred and has the potential to affect the city; or,

Monthly testing; or,

Other emergencies, as deemed necessary by City of Coppell administration.

​The City of Coppell currently operates seventeen (17) sirens strategically placed throughout the city.

​​​​How Do They Work?​

On any given day, during an emergency or for testing purposes, Coppell's OWS is activated by the Emergency Management Coordinator. He has the ability to activate all 17 sirens at once, or activate a select few sirens depending on the location of the emergency.

​Sirens are activated locally for the conditions outlaid above.​​

All activations of the siren emit a 3-minute steady tone (click icon to the right​ for example).

If the threat persists, the steady tone may be reactivated for additional 3-minute increments as the threat continues.

In addition to the steady tone, the OWS can also function as a city-wide public address system, capable or relaying voice alerts and other tones.